20305032133 has 8 divisors (see below), whose sum is σ = 20674324800. Its totient is φ = 19936577568.

The previous prime is 20305032131. The next prime is 20305032149. The reversal of 20305032133 is 33123050302.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20305032133 - 2¹ = 20305032131 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20305032131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160528 + ... + 257641.

It is an arithmetic number, because the mean of its divisors is an integer number (2584290600).

Almost surely, 2^20305032133 is an apocalyptic number.

It is an amenable number.

20305032133 is a deficient number, since it is larger than the sum of its proper divisors (369292667).

20305032133 is an equidigital number, since it uses as much as digits as its factorization.

20305032133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 419051.

The product of its (nonzero) digits is 1620, while the sum is 22.

Adding to 20305032133 its reverse (33123050302), we get a palindrome (53428082435).

The spelling of 20305032133 in words is "twenty billion, three hundred five million, thirty-two thousand, one hundred thirty-three".